Add fftw and netlib-lapack as passive dependencies for jedi-neptune-env

[climbfuji]

Summary

See JCSDA/spack#391 for a description of what the submodule pointer update does.

Testing

• tested locally on macOS with spack-stack develop
• tested on Nautilus in spack-stack-1.6.0 (I added the two packages manually to the release so that they are available now)
• CI

Applications affected

n/a

Systems affected

Nautilus, Narwhal

Dependencies

• waiting on Add fftw and netlib-lapack as passive dependencies for jedi-neptune-env spack#391

Issue(s) addressed

Resolves #941

Checklist

• This PR addresses one issue/problem/enhancement, or has a very good reason for not doing so.
• These changes have been tested on the affected systems and applications.
• All dependency PRs/issues have been resolved and this PR can be merged.